WO2022209566A1 - Film de diffusion de lumière anisotrope et dispositif d'affichage - Google Patents

Film de diffusion de lumière anisotrope et dispositif d'affichage Download PDF

Info

Publication number
WO2022209566A1
WO2022209566A1 PCT/JP2022/009243 JP2022009243W WO2022209566A1 WO 2022209566 A1 WO2022209566 A1 WO 2022209566A1 JP 2022009243 W JP2022009243 W JP 2022009243W WO 2022209566 A1 WO2022209566 A1 WO 2022209566A1
Authority
WO
WIPO (PCT)
Prior art keywords
anisotropic light
light
diffusion film
light diffusion
anisotropic
Prior art date
Application number
PCT/JP2022/009243
Other languages
English (en)
Japanese (ja)
Inventor
純弥 荒島
昌央 加藤
Original Assignee
株式会社巴川製紙所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社巴川製紙所 filed Critical 株式会社巴川製紙所
Priority to JP2023510715A priority Critical patent/JPWO2022209566A1/ja
Priority to CN202280012709.6A priority patent/CN116802526A/zh
Publication of WO2022209566A1 publication Critical patent/WO2022209566A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/877—Arrangements for extracting light from the devices comprising scattering means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details

Definitions

  • the present invention relates to an anisotropic light-diffusing film and a display device comprising the anisotropic light-diffusing film.
  • a transmissive TN system liquid crystal when the display device is viewed obliquely in a specific direction, the brightness and contrast decrease, and the color changes (grayscale reversal) when viewed from the front direction. There was a problem with viewing angle dependence.
  • Patent Document 1 by using an anisotropic optical film in which the direction in which the color change of the display device is minimized and the scattering center axis are in a specific angle range for the display device, luminance and color depending on the viewing angle Improving the problem of change.
  • an object of the present invention is to provide an anisotropic light diffusion film that has a viewing angle dependency improvement effect superior to that of conventional films with respect to luminance and color changes depending on the viewing angle.
  • the present invention is as follows.
  • the present invention An anisotropic light diffusion film whose linear transmittance, which is (amount of transmitted light in a linear direction of incident light)/(amount of incident light), changes depending on the incident angle of light,
  • the anisotropic light diffusion film has one scattering central axis, a matrix region, and a plurality of columnar regions having different refractive indices from the matrix region, The plurality of columnar regions are oriented and extend from one surface to the other surface of the anisotropic light diffusion film,
  • the aspect ratio of the columnar region which is the average major axis/average minor axis of the columnar region in a cross section perpendicular to the columnar axis of the columnar region, is 2 to 12;
  • the maximum in-line transmittance of the anisotropic light diffusion film in the tilt direction of the scattering center axis is 30% or less,
  • the average minor axis is 0.5 to 1.6 and the average major axis is 4.5 to 14.0.
  • the linear transmittance at a light incident angle of 60° is preferably 3% or less.
  • the anisotropic light-diffusing film preferably has a haze value of 75% to 85%.
  • a liquid crystal display device comprising a liquid crystal layer and the anisotropic light diffusion film
  • the liquid crystal display device is characterized in that the anisotropic light diffusion film is laminated on the viewing side of the liquid crystal layer.
  • an organic EL display device comprising a light-emitting layer and the anisotropic light diffusion film
  • the organic EL display device is characterized in that the anisotropic light diffusion film is laminated on the viewing side of the light-emitting layer.
  • an anisotropic light diffusion film that has a viewing angle dependency improvement effect superior to that of conventional films with respect to luminance and color changes depending on the viewing angle.
  • FIG. 4 is an explanatory diagram showing an example of incident angle dependency of an anisotropic light diffusion film
  • FIG. 3 is a top view showing the surface structure of an anisotropic light-diffusing film
  • It is a schematic diagram which shows the example of an anisotropic light-diffusion film. It is a three-dimensional polar coordinate representation for explaining the scattering central axis in an anisotropic light diffusion film.
  • 4 is a graph showing an example of an optical profile in an anisotropic light diffusion film; It is a schematic diagram which shows the incident light angle dependence measuring method of an anisotropic light-diffusion film. It is a schematic diagram which shows the manufacturing method of the anisotropic light-diffusion film which concerns on this invention.
  • the anisotropic light-diffusing film according to the present invention will be briefly described below, and then its structure, physical properties, manufacturing method, and specific applications will be described.
  • An anisotropic light diffusion film is a film having optical anisotropy, in which linear transmittance [(amount of incident light transmitted in a linear direction)/(amount of incident light)] changes depending on the incident angle of light. That is, with respect to incident light to the anisotropic light diffusion film, incident light within a predetermined angle range is transmitted while maintaining linearity, and incident light within other angle ranges exhibits diffusing properties.
  • the anisotropic light diffusion film shown in FIG. 1 it exhibits diffusibility when the incident angle is 20° to 50°, and exhibits no diffusivity at other incident angles and exhibits linear transparency.
  • the anisotropic light-diffusing film of the present invention has a matrix region and a plurality of columnar regions having different refractive indices from those of the matrix region.
  • a plurality of columnar regions included in the anisotropic light-diffusing film are usually oriented and extended from one surface to the other surface of the anisotropic light-diffusing film (see FIG. 3, etc.).
  • the difference in refractive index is not particularly limited as long as there is a difference to the extent that at least part of the light incident on the anisotropic light diffusion film is reflected at the interface between the matrix region and the columnar region.
  • the length of the columnar region is not particularly limited, and may be a length that penetrates from one surface of the anisotropic light diffusion film to the other surface, or a length that does not reach from one surface to the other surface.
  • An anisotropic light-diffusing film has a central scattering axis.
  • the scattering center axis and the orientation direction (extending direction) of the columnar regions are generally parallel to each other. It should be noted that the scattering center axis and the orientation direction of the columnar regions being parallel only need to satisfy the refractive index law (Snell's law), and need not be strictly parallel.
  • n 1 sin ⁇ 1 A relationship of n 2 sin ⁇ 2 is established.
  • the orientation direction (refractive angle) of the columnar regions is about 19°.
  • FIG. 4 is a three-dimensional polar coordinate representation for explaining the scattering center axis P in the anisotropic light diffusion film.
  • the scattering central axis is the direction that coincides with the incident light angle of light whose light diffusion properties are substantially symmetrical with respect to the incident light angle when the incident light angle to the anisotropic light diffusion film is changed.
  • the incident light angle at this time is approximately between the minimum values in the optical profile (FIG. 5) obtained by measuring the linear transmittance of the anisotropic light diffusion film and plotting the linear transmittance for each incident light angle. It becomes the central part (the central part of the diffusion region).
  • the scattering center axis is the polar angle ⁇ and the azimuth when the surface of the anisotropic light diffusion film is the xy plane and the normal line to the surface of the anisotropic light diffusion film is the z axis.
  • the angle ⁇ In other words, Pxy in FIG. 4 can be said to be the length direction of the scattering center axis projected on the surface of the anisotropic light diffusion film.
  • the polar angle ⁇ ( ⁇ 90° ⁇ 90°) formed by the normal to the anisotropic light diffusion film (z-axis shown in FIG. 4) and the columnar region can be defined as the scattering central axis angle.
  • the angle of the axial direction of the columnar regions can be adjusted within a desired range by changing the direction of the irradiated light beam.
  • the scattering central axis angle ⁇ of the anisotropic light diffusion film is 35° to 45°, preferably 35° to 43°.
  • the cross-sectional shape of the columnar region in the cross section perpendicular to the column axis can be a shape having a minor axis and a major axis.
  • the shape of the cross section perpendicular to the columnar axis of the columnar region is not particularly limited, and may be circular, elliptical, or polygonal, for example.
  • the minor axis and the major axis are equal; in the case of an ellipse, the minor axis is the length of the minor axis and the major axis is the length of the major axis;
  • the shortest length can be used as the short axis, and the longest length can be used as the long axis.
  • the minor axis and major axis of the columnar region were determined by observing the cross section perpendicular to the columnar axis of the columnar region (the cross section near the center of the thickness of the anisotropic light-diffusing film) with an optical microscope, and measuring the length of each of 20 arbitrarily selected columnar regions. It is possible to measure the diameter and the major diameter and use these average values.
  • the aspect ratio of the columnar region is calculated as the ratio of the average major axis to the average minor axis (average major axis/average minor axis).
  • the average short diameter (average short diameter) of the columnar regions is preferably 0.5 ⁇ m or more, more preferably 0.8 ⁇ m or more, and more preferably 1.0 ⁇ m or more. More preferred.
  • the average minor axis of the columnar regions is preferably 1.6 ⁇ m or less, more preferably 1.4 ⁇ m or less, and even more preferably 1.2 ⁇ m or less. The lower limit value and upper limit value of the minor axis of these columnar regions can be combined as appropriate.
  • the average major axis (average major axis) of the columnar regions is preferably 4.5 ⁇ m or more, more preferably 5.0 ⁇ m or more, further preferably 5.5 ⁇ m or more. .
  • the average major axis of the columnar regions is preferably 14.0 ⁇ m or less, more preferably 11.5 ⁇ m or less, even more preferably 11.0 ⁇ m or less.
  • the average major axis of the columnar regions is preferably shorter than the length of the columnar regions. By doing so, it is possible to increase the linear light transmittance of the anisotropic light-diffusing film.
  • the lower limit and upper limit of the major axis of these columnar regions can be combined as appropriate.
  • the aspect ratio of the columnar regions is preferably 2-12, more preferably 5-8.
  • the anisotropic light-diffusing film may contain a plurality of columnar regions having one aspect ratio, or may contain a plurality of columnar regions having different aspect ratios.
  • FIG. 2 shows the cross-sectional shape of the columnar region in the cross section perpendicular to the columnar axis of the columnar region.
  • LA represents the major axis
  • SA represents the minor axis.
  • FIG. 2(a) shows an anisotropic light-diffusing film in which the aspect ratio of the columnar regions is 2 to 20
  • FIG. 2(b) shows an anisotropic light-diffusing film in which the aspect ratio of the columnar regions is 1 or more and less than 2. ing.
  • a columnar region having a scattering central axis angle of 0° will be taken as an example to describe the general properties related to the aspect ratio of the columnar region.
  • the aspect ratio is 1 or more and less than 2
  • the transmitted light is isotropically diffused (see FIG. 3A).
  • the aspect ratio is 2 to 20
  • diffusion occurs with an anisotropy corresponding to the aspect ratio ⁇ see FIG. 3(b) ⁇ .
  • FIG. 5 is a graph showing an example of an optical profile in an anisotropic light diffusion film having a scattering central axis angle of 0°. point to As shown in FIG. 5, the anisotropic light diffusing film has light diffusing properties dependent on the incident light angle, in which the linear transmittance changes depending on the incident light angle.
  • An optical profile can be created, for example, as follows.
  • an anisotropic light diffusing film is placed between the light source 1 and the detector 2 as shown in FIG.
  • the incident light angle is 0° when the irradiation light I from the light source 1 is incident from the normal direction of the anisotropic light diffusion film.
  • the anisotropic light diffusion film is arranged so as to be arbitrarily rotatable with the straight line V as the axis of rotation, and the light source 1 and the detector 2 are fixed. That is, according to this method, a sample (anisotropic light diffusion film) is placed between the light source 1 and the detector 2, and the sample is transmitted straight through while changing the angle with the straight line V on the sample surface as the axis of rotation for detection. The amount of linearly transmitted light entering the device 2 is measured. After that, the linear transmittance is calculated from the amount of linearly transmitted light, and the linear transmittance is plotted for each angle to create an optical profile. With this evaluation method, it is possible to evaluate in which range of angles the incident light is diffused.
  • the optical profile does not directly express the light diffusibility, but if it is interpreted that the diffuse transmittance increases due to the decrease in the in-line transmittance, it generally indicates the light diffusivity. It can be said that
  • a normal isotropic light diffusion film exhibits a mountain-shaped optical profile with a peak at an incident light angle near 0°.
  • the linear transmittance is It exhibits a small, valley-shaped optical profile in which the linear transmittance increases as the absolute value of the incident light angle increases.
  • the anisotropic light diffusion film has the property that the incident light is strongly diffused in the incident light angle range close to the scattering center axis, but the diffusion weakens and the linear transmittance increases in the incident light angle range beyond that.
  • the optical profile moves so that the linear transmittance decreases at incident light angles near the scattering central axis angle (the troughs of the optical profile (Move to the scattering central axis angle side).
  • the linear transmittance of light incident on the anisotropic light diffusion film at the incident angle at which the linear transmittance is minimized is referred to as the minimum linear transmittance.
  • the angle range of the two incident light angles with respect to the intermediate value of the linear transmittance between the maximum linear transmittance and the minimum linear transmittance is defined as a diffusion area (the width of this diffusion area is the "diffusion width"). and the incident light angle range other than that is called a non-diffusion region (transmission region).
  • the in-line transmittance should be adjusted by adjusting the refractive index of the material of the anisotropic light diffusion film (difference in refractive index when multiple resins are used), coating film thickness, UV illumination, and curing conditions such as temperature during structure formation. can be done.
  • the anisotropic light-diffusing film has a maximum in-line transmittance of 30% or less, preferably 25% or less, more preferably 20% or less in the tilted direction of the scattering central axis, More preferably 10% to 18%.
  • the in-line transmittance of light at an incident angle of 0° of the anisotropic light-diffusing film is 5% or more, preferably 7% or more, and more preferably 10% or more.
  • the upper limit is not particularly limited, it is, for example, 20%.
  • the linear light transmittance of the anisotropic light-diffusing film at an incident angle of 60° is preferably 3% or less, more preferably 2% or less, and even more preferably 1% or less.
  • the haze value (total haze) of an anisotropic light-diffusing film is an index showing the diffusibility of the anisotropic light-diffusing film. As the haze value increases, the diffusibility of the anisotropic light-diffusing film increases.
  • a method for measuring the haze value is not particularly limited, and it can be measured by a known method. For example, it can be measured according to JIS K7136-1:2000 "Plastics - Determination of haze of transparent materials".
  • the haze value of the anisotropic light-diffusing film is not particularly limited, it is preferably 60% to 85%, more preferably 75% to 85%, even more preferably 76% to 82%.
  • the haze value can be adjusted by adjusting the refractive index of the material of the anisotropic light diffusion film (difference in refractive index when multiple resins are used), coating film thickness, UV illuminance, and curing conditions such as temperature during structure formation. can.
  • the thickness of the anisotropic light-diffusing film is not particularly limited, but is preferably 15 ⁇ m to 100 ⁇ m, more preferably 20 ⁇ m to 60 ⁇ m, even more preferably 30 ⁇ m to 60 ⁇ m. By setting it in such a range, it is possible to reduce manufacturing costs such as material costs and costs required for UV irradiation, and to achieve a sufficient effect of improving visual dependence.
  • raw materials for the anisotropic light-diffusing film are described in order of (1) (meth)acrylic acid ester, (2) low refractive material, (3) polymerization initiator, (4) polymerization inhibitor, and other optional components.
  • a composition used for producing an anisotropic optical film is hereinafter referred to as an anisotropic light-diffusing film composition.
  • the constituent components of the composition for an anisotropic light-diffusing film preferably contain a low refractive material.
  • the scope of the present invention also includes a slight reaction between the constituent components during storage of the composition for an anisotropic light-diffusing film.
  • the raw materials of the anisotropic light diffusion film are not limited to these.
  • the refractive index of each component indicates that measured by a method conforming to JIS K0062.
  • the (meth)acrylic ester must be a (meth)acrylic ester with a high refractive index. Specifically, the (meth)acrylic ester has a refractive index n A of 1.50 to 1.65. preferably 1.50 to 1.60, particularly preferably 1.55 to 1.60.
  • the (meth)acrylic acid ester is a (meth)acrylic acid ester having one or more aromatic rings and (meth)acryloyl groups.
  • the number of (meth)acryloyl groups contained in the (meth)acrylic acid ester is not particularly limited, but is preferably 1 or 2 or more, and the upper limit is not particularly limited, but is preferably 8 or less. .
  • the (meth)acrylic acid ester preferably has a plurality of aromatic rings.
  • the structure containing a plurality of aromatic rings it preferably has a biphenyl ring structure and/or a diphenyl ether structure.
  • Such a biphenyl structure or diphenyl ether structure may have only one structure or two or more structures in the skeleton. Having such a structure results in a (meth)acrylic acid ester having a very high refractive index.
  • Examples of such (meth)acrylic acid esters include, but are not limited to, biphenyl compounds represented by the following general formula (1), diphenyl ether compounds represented by the following general formula (2), and the like.
  • R 1 to R 10 are each independent, and any one of R 1 to R 10 is a substituent represented by general formula (3) or (4) below.
  • the remainder may be free of (meth)acryloyl groups, specifically hydrogen atoms, hydroxyl groups, carboxyl groups, alkyl groups, alkoxy groups, halogenated alkyl groups, hydroxyalkyl groups, carboxyalkyl groups and halogen Substituents such as atoms are included.
  • R 11 to R 20 are each independent, and any one of R 11 to R 20 is a substituent represented by general formula (3) or (4) below. .
  • the remainder may be free of (meth)acryloyl groups, specifically hydrogen atoms, hydroxyl groups, carboxyl groups, alkyl groups, alkoxy groups, halogenated alkyl groups, hydroxyalkyl groups, carboxyalkyl groups and halogen Substituents such as atoms are included.
  • R 21 is a hydrogen atom or a methyl group, the number of carbon atoms n is an integer of 1 to 4, and the number of repetitions m is an integer of 1 to 10.
  • R 22 is a hydrogen atom or a methyl group, the number of carbon atoms n is an integer of 1 to 4, and the number of repetitions m is an integer of 1 to 10.
  • the repeating number m in the substituents represented by the general formulas (3) and (4) is usually preferably an integer of 1 to 10, more preferably an integer of 1 to 4, and an integer of 1 to 2 is more preferable.
  • the number of carbon atoms n in the substituents represented by formulas (3) and (4) is preferably an integer of 1-4, more preferably an integer of 1-2.
  • biphenyl compound represented by the general formula (1) As a specific example of the biphenyl compound represented by the general formula (1), a compound represented by the following formula (5) can be preferably mentioned.
  • the (meth)acrylic acid ester may contain only one type of the component as described above, or may contain a plurality of types.
  • the low refractive material is a material with a relatively low refractive index (low refractive index material).
  • the refractive index n B of the low refractive material is preferably 1.35 to 1.54. It is more preferably 1.35 or more and less than 1.50, further preferably 1.40 or more and less than 1.50, and particularly preferably 1.45 or more and less than 1.50.
  • the refractive index nB of the low refractive material is smaller than the refractive index nA .
  • the difference (n A ⁇ n B ) between the refractive index n A of the (meth)acrylic acid ester and the refractive index n B of the low refractive material is preferably 0.01 to 0.3, more preferably 0.03 to 0.03 0.3 is more preferred, and 0.05 to 0.3 is even more preferred.
  • the low refractive material is not particularly limited as long as it satisfies the above refractive index, and known resin materials can be used, such as acrylic resins, styrene resins, styrene-acrylic copolymers, polyurethane resins, polyester resins, epoxy resins, Cellulose resins, silicone resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral resins, polyvinyl alcohol resins, polyvinyl formal resins, polyvinyl acetal resins, polyvinylidene fluoride, and the like.
  • the low refractive material is preferably a copolymer, more preferably an acrylic copolymer. In this case, the content of the (meth)acrylic acid ester in the constituent monomers is preferably 10% by weight to 80% by weight.
  • the low-refractive material is particularly a urethane ( A meth)acrylic acid ester is preferred.
  • cycloaliphatic compounds having two isocyanate groups include alicyclic polyisocyanates such as isophorone diisocyanate (IPDI) and hydrogenated diphenylmethane diisocyanate.
  • IPDI isophorone diisocyanate
  • hydrogenated diphenylmethane diisocyanate examples include hydrogenated diphenylmethane diisocyanate.
  • polyol compounds examples include polyethylene glycol, polypropylene glycol, polybutylene glycol, and polyhexylene glycol, with polypropylene glycol being preferred.
  • Hydroxyalkyl (meth)acrylates include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxy Examples include butyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate.
  • the low-refractive material can be manufactured by synthesizing the components described above according to a conventional method.
  • the blending ratio of each component is not particularly limited. : 1:1 to 5 molar ratio.
  • the low refractive material is preferably a thermoplastic polymer.
  • the glass transition temperature of the low refractive material is preferably ⁇ 40° C. or higher, more preferably 0° C. or higher, and particularly preferably 30° C. or higher. Although the upper limit of the glass transition temperature is not particularly limited, it is preferably 150° C. or less, for example.
  • the glass transition temperature can be measured by a known measuring method, for example, a method conforming to JIS K7121-1987 "Plastic transition temperature measuring method".
  • the weight average molecular weight of the low refractive material is preferably 1,000 to 500,000, more preferably 2,000 to 50,000, even more preferably 3,000 to 20,000.
  • the weight average molecular weight can be measured using a known measurement method, for example, the GPC method as a polystyrene equivalent molecular weight.
  • the compatibility with the (meth)acrylic acid ester can be enhanced, and an anisotropic light-diffusing film with excellent performance can be obtained.
  • the low-refractive material may contain only one type of component as described above, or may contain a plurality of types. If the low-refractive material is composed of multiple components, the refractive index of the low-refractive material may be the average value thereof.
  • the polymerization initiator is a compound that generates radical species by irradiation with active energy rays such as ultraviolet rays, and conventionally known ones can be used.
  • polymerization initiators examples include benzophenone, benzyl, Michler's ketone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-diethoxyacetophenone, benzyl dimethyl ketal, 2,2-dimethoxy-1,2-diphenylethan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexylphenylketone, 2-methyl-1-[4- (methylthio)phenyl]-2-morpholinopropanone-1, 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propan-1-one, bis(cyclopentadi enyl)-bis[2,6-difluoro-3-(pyr-1-yl)phenyl]titanium, 2-benzyl-2
  • the polymerization initiator may be used by dissolving the powder directly in the polymerizable compound, but if the solubility is poor, the polymerization initiator can be dissolved in a solvent in advance and used.
  • a polymerization inhibitor is a polymerization inhibitor having a structure in which a carbonyl group or a hydroxyl group is added as a substituent of a conjugated cyclic compound.
  • polymerization inhibitors having the above structure examples include so-called quinone-based and phenol-based polymerization inhibitors.
  • the polymerization inhibitor is preferably one or more compounds selected from the group consisting of compounds represented by the following chemical formulas (D1) to (D6).
  • R1 to R5 are each independently a hydrogen atom, a halogen atom, a carboxyl group, or a C1 to C4 (preferably C1 to C3) alkoxy group (e.g., methoxy group, ethoxy propyloxy) or an alkyl group (eg methyl, ethyl, propyl or tert-butyl).
  • polymerization inhibitors include hydroquinone-based (e.g., formula (D1) above), quinone methide-based (e.g., formulas (D2) and (D4) above), benzoquinone-based (e.g., formula (D3) above), A phenol-based (eg, formula (D5) above) or a catechol-based (eg, formula (D6) above) polymerization inhibitor is preferred.
  • the polymerization inhibitor may have a structure to which a carbonyl group or a hydroxyl group is added, in addition to the above formulas (D1) to (D6), pyrogallol-based, naphthoquinone-based polymerization inhibitors, etc. can also be used. .
  • thermosetting initiator capable of curing the photopolymerizable compound by heating can be used together with the photopolymerization initiator.
  • the polymerization and curing of the photopolymerizable compound can be further accelerated and completed by heating after photocuring.
  • a solvent for preparing a composition containing a photopolymerizable compound for example, ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, etc. can be used.
  • the acid generator used as the cationic polymerization initiator remains after the composition is cured, it is possible that other parts may malfunction when used in devices such as displays. Therefore, as other components, it is preferable not to contain an acid generator.
  • the content of the acid generator in the composition is preferably 1% or less.
  • the content of the (meth)acrylic acid ester relative to the total solid content of the composition is not particularly limited, but is 30% by weight or more, 35% by weight or more, and 40% by weight. or more, or preferably 45% by weight or more.
  • the upper limit is not particularly limited, it is preferably, for example, 99% by weight, 95% by weight, 90% by weight, 85% by weight, 80% by weight, 70% by weight, or 60% by weight.
  • the content of the low refractive material in the composition is preferably 10 parts by weight to 400 parts by weight, and 25 parts by weight to 200 parts by weight, when the content of the (meth)acrylic acid ester is 100 parts by weight. and more preferably 50 to 100 parts by weight.
  • the content of the low refractive material relative to the total amount of non-volatile components of the composition is preferably 10% by weight to 80% by weight, preferably 15% by weight. It is more preferably ⁇ 70% by weight, and even more preferably 20% to 60% by weight.
  • the content of the polymerization initiator in the composition is preferably 0.1 to 20 parts by weight, preferably 0.5 to 15 parts by weight, when the total amount of non-volatile components in the composition is 100 parts by weight. It is more preferably 1 part by weight to 10 parts by weight. Further, according to another aspect, the content of the polymerization initiator relative to the total amount of non-volatile components in the composition is preferably 0.1% by weight to 10% by weight, and is 0.5% by weight to 8% by weight. is more preferable, and 0.8% by weight to 5% by weight is even more preferable.
  • the content of the polymerization inhibitor in the composition is preferably 0.001 part by weight to 1 part by weight, preferably 0.005 part by weight to 0.005 part by weight, based on 100 parts by weight of the total amount of non-volatile components in the composition. It is more preferably 5 parts by weight, still more preferably 0.008 to 0.1 parts by weight, and particularly preferably 0.015 to 0.05 parts by weight. Further, from another point of view, the content of the polymerization inhibitor in the composition with respect to the total amount of non-volatile components of the composition is preferably 0.001% by weight to 0.5% by weight, and 0.005% by weight. It is more preferably ⁇ 0.1 wt%, and even more preferably 0.01 wt% to 0.04 wt%.
  • the ratio represented by [content of polymerization inhibitor/content of polymerization initiator] is preferably from 0.005 to 0.1, and from 0.01 to 0.05. is more preferred.
  • composition for an anisotropic optical film according to the present invention makes it possible to obtain an anisotropic optical film having excellent diffusibility by setting the content of each component within the range described above.
  • the above composition for an anisotropic light diffusion film (hereinafter sometimes referred to as "photocurable resin composition") is coated on an appropriate substrate such as a transparent PET film to form a sheet, and a film is formed. Then, if necessary, it is dried to volatilize the solvent to form an uncured resin composition layer. By irradiating the uncured resin composition layer with light, an anisotropic light diffusion film can be produced.
  • Step 1-1 Step of providing an uncured resin composition layer on a substrate
  • Step 1-2 Step of obtaining parallel light from a light source
  • Step 1-3 Directive light Obtaining step
  • Step 1-4 Step of curing the uncured resin composition layer
  • Step of providing uncured resin composition layer on substrate> The method of providing the photocurable resin composition in the form of a sheet on the substrate as an uncured resin composition layer is applied by a normal coating method or a printing method. Specifically, air doctor coating, bar coating, blade coating, knife coating, reverse coating, transfer roll coating, gravure roll coating, kiss coating, cast coating, spray coating, slot orifice coating, calender coating, dam coating, dip coating , coating such as die coating, intaglio printing such as gravure printing, and printing such as stencil printing such as screen printing can be used. If the composition has a low viscosity, a dam of a certain height can be provided around the substrate and the composition can be cast into the area surrounded by the dam.
  • step 1-1 in order to prevent oxygen inhibition of the uncured resin composition layer and efficiently form the columnar regions that are characteristic of the anisotropic light diffusion film, the uncured resin composition layer is adhered to the light irradiation side. It is also possible to laminate a mask that locally changes the irradiation intensity of light.
  • a light-absorbing filler such as carbon is dispersed in the matrix, and a part of the incident light is absorbed by the carbon, but the aperture is structured so that the light can be sufficiently transmitted.
  • a matrix include transparent plastics such as PET, TAC, PVAc, PVA, acryl, and polyethylene; inorganic materials such as glass and quartz; It may contain a pigment that absorbs the
  • Step 1-2 Step of obtaining parallel rays from the light source>
  • a short-arc ultraviolet light source is usually used, and specifically, a high-pressure mercury lamp, a low-pressure mercury lamp, a methhalide lamp, a xenon lamp, or the like can be used. At this time, it is necessary to obtain a light beam parallel to the desired scattering center axis.
  • an optical lens such as a Fresnel lens for irradiation, it can be obtained by arranging a reflecting mirror behind the light source so that light is emitted as a point light source in a predetermined direction.
  • Step 1-3 is a step of making parallel light beams incident on a directional diffusion element to obtain light beams with directivity.
  • FIG. 7 is a schematic diagram showing the method for producing an anisotropic light-diffusing film in step 1-3 according to the present invention.
  • the directional diffusion elements 301 and 302 used in step 1-3 may be those that impart directivity to the parallel light beams D incident from the light source 300 .
  • FIG. 7 describes that the directional light E is incident on the uncured resin composition layer 303 in such a manner that it diffuses much in the X direction and scarcely diffuses in the Y direction.
  • needle-like fillers having a high aspect ratio are contained in the directional diffusion elements 301 and 302, and the needle-like fillers are arranged in the Y direction in the long axis direction. It is possible to adopt a method of orienting such that the Directional diffusion elements 301 and 302 can use various methods other than the method of using needle-like fillers.
  • the aspect ratio of the light E with directivity is preferably 2-20.
  • a columnar region having an aspect ratio substantially corresponding to the aspect ratio is formed.
  • the upper limit of the aspect ratio is more preferably 10 or less, even more preferably 5 or less. If the aspect ratio exceeds 20, interference rainbows and glare may occur.
  • the size of the columnar regions to be formed (aspect ratio, minor axis SA, major axis LA, etc.) can be appropriately determined by adjusting the spread of the light E with directivity.
  • the anisotropic light-diffusing film of this embodiment can be obtained.
  • the difference between (a) and (b) of FIG. 7 is that the spread of the light E with directivity is large in (a) but small in (b).
  • the size of the columnar region differs depending on the size of the spread of the light E having directivity.
  • the spread of the light E with directivity mainly depends on the types of the directional diffusion elements 301 and 302 and the distance from the uncured resin composition layer 303 .
  • Step 1-4 Step of curing the uncured resin composition layer>
  • the light beam that is applied to the uncured resin composition layer to cure the uncured resin composition layer must contain a wavelength capable of curing the photopolymerizable compound, and is usually centered at 365 nm of a mercury lamp. wavelengths of light are used.
  • the illuminance is preferably in the range of 0.01 mW/cm 2 to 100 mW/cm 2 , more preferably 0.1 mW/cm 2 to 20 mW/cm 2 .
  • the illuminance is less than 0.01 mW/cm 2 , it takes a long time for curing, resulting in poor production efficiency. , the desired optical characteristics cannot be exhibited.
  • the light irradiation time is not particularly limited, it is preferably 10 seconds to 180 seconds, more preferably 30 seconds to 120 seconds.
  • the anisotropic light-diffusing film of this embodiment can be obtained by irradiating the light beam.
  • the anisotropic light-diffusing film is obtained by forming a specific internal structure in the uncured resin composition layer by irradiating the film with low-intensity light for a relatively long time. Therefore, such light irradiation alone may leave unreacted monomer components, causing stickiness and problems in handleability and durability.
  • the residual monomer can be polymerized by additionally irradiating light with a high illuminance of 1000 mW/cm 2 or more. At this time, light irradiation may be performed from the side opposite to the side on which the mask is laminated.
  • the scattering center axis of the resulting anisotropic light-diffusing film can be set to a desired value by adjusting the angle of light with which the uncured resin composition layer is irradiated.
  • anisotropic light diffusion films >>>>>>>>> Since the anisotropic light diffusion film is excellent in the effect of improving the viewing angle dependence, it can be applied to all kinds of display devices such as liquid crystal display devices, organic EL display devices and plasma displays.
  • the anisotropic light-diffusing film can be particularly preferably used in TN mode liquid crystals, which tend to have viewing angle dependency problems.
  • a liquid crystal display device including a liquid crystal layer and an anisotropic light diffusion film.
  • the anisotropic light-diffusing film is provided on the viewing side of the liquid crystal layer.
  • the liquid crystal display device may be of any of the TN system, VA system, IPS system, and the like. More specifically, a general liquid crystal device includes a light source, a polarizing plate, a glass substrate, a transparent electrode film, a liquid crystal layer, a transparent electrode film, a color filter, a glass substrate, and a polarizing plate from the display device toward the viewing side. Although it has a layered structure in which it is laminated in order and further has an appropriate functional layer, the anisotropic light-diffusing film may be provided anywhere on the viewing side of the liquid crystal layer.
  • an organic EL display device including a light emitting layer and an anisotropic light diffusion film.
  • the anisotropic light-diffusing film is provided (stacked) on the viewing side of the light-emitting layer (including the electrode connected to the light-emitting layer).
  • the organic EL display device may be of any type such as a top emission method or a bottom emission method, and in the case of a color organic EL display device, may be of any type such as an RGB coloring method or a color filter method. good. Further, the organic EL display may be multi-layered.
  • the following UV curable resin composition was added dropwise to this to form a liquid film having a thickness of 20 ⁇ m to 50 ⁇ m, which was covered with another PET film.
  • ⁇ m-phenoxybenzyl acrylate (refractive index: 1.57) 54 parts by weight ⁇ Copolymer composed of polymethyl methacrylate (PMMA) and polybutyl acetate (copolymer having 50% (meth)acrylate, refractive index : 1.48) 45 parts by weight 2,2-dimethoxy-2-phenylacetophenone (manufactured by IGM Resins BV, trade name: Omnirad 651) 1.3 parts by weight 2,5-di-t-butyl -1,4-benzoquinone (manufactured by Tokyo Chemical Industry Co., Ltd.) 0.02 parts by weight
  • the liquid film sandwiched between PET films on both sides was irradiated with an irradiation unit of UV spot light source (trade name: L2859-01, manufactured by Hamamatsu Photonics Co., Ltd.) with an irradiation intensity of 10 mW/cm 2 to 100 mW/cm 2 .
  • UV spot light source trade name: L2859-01, manufactured by Hamamatsu Photonics Co., Ltd.
  • irradiation intensity 10 mW/cm 2 to 100 mW/cm 2 .
  • Ultraviolet rays which are parallel rays, were irradiated through a PMMA lens.
  • the aspect ratio of the columnar regions was adjusted by expanding the parallel rays in the horizontal direction using the PMMA lens when irradiating the ultraviolet rays.
  • anisotropic light-diffusing films 1 to 6 of Examples and anisotropic light-diffusing films 7 to 10 of Comparative Examples having the optical properties shown in Table 1 were obtained.
  • the anisotropic light diffusion films obtained in Examples and Comparative Examples were measured using a micrometer (manufactured by Mitutoyo Corporation).
  • the thickness of the anisotropic light-diffusing film was taken as the average value of the values measured at a total of 5 points including the vicinity of four corners on the plane of the anisotropic light-diffusing film and one point near the center of the plane.
  • the anisotropic light-diffusing film was rotated around the straight line V, and the amount of linearly transmitted light entering the detector 2 after passing straight through the anisotropic light-diffusing film was measured.
  • the linear transmittance was calculated from the amount of linearly transmitted light, and the linear transmittance was plotted for each angle to create an optical profile.
  • the linear transmittance was measured at a wavelength in the visible light region using a visibility filter. Based on the optical profile obtained as a result of the above measurements, the maximum value (maximum linear transmittance) and minimum value (minimum linear transmittance) of the linear transmittance are obtained.
  • the scattering central axis angle was obtained from the approximate central portion (the central portion of the diffusion region).
  • the anisotropic light-diffusing films of Examples and Comparative Examples are placed on the surface of a TN-mode liquid crystal display so that the direction of the gradation reversal of the liquid crystal display and the direction of inclination of the scattering central axis of the anisotropic light-diffusing film are aligned. It was laminated so that the angle would be 0°. Subsequently, using a viewing angle measuring device Conometer 80 (manufactured by Westboro), when gray scales divided into 11 gradations from white to black are displayed on the liquid crystal display screen, the normal direction of the liquid crystal display The luminance distribution was measured in the polar angle range of 0° to 80°.
  • ⁇ Determination Criteria for Polar Angle 75° Contrast> A contrast of 18 or more was evaluated as ⁇ , a contrast of 15 or more and less than 18 was evaluated as ⁇ , and a contrast of less than 15 was evaluated as x.
  • ⁇ Determination Criteria for Gradation Inversion> A tone reversal angle of 75° or more was evaluated as ⁇ , 65° or more and less than 75° as ⁇ , and less than 65° as x.
  • Comparative Example 1 had a small central axis angle of scattering and a small diffusivity in the oblique direction, that is, the contrast at a deep angle (75°) was low. In both Comparative Examples 2 and 3, the contrast at a deep angle was good, and the diffusivity in the oblique direction was sufficient.
  • Comparative Example 3 since the in-line transmittance at an incident angle of 0° was small, the diffusivity of the light emitted in the front direction was strong, and the visibility was also lowered. In Comparative Example 4, although the aspect ratio was large and the visual clarity was sufficient, the diffusibility in the oblique direction was low, so the contrast at deep angles was low.
  • the anisotropic light-diffusing film of the present invention when used in a display device such as a TN liquid crystal display, it is possible to suppress gradation reversal, improve contrast at deep angles, and suppress reduction in visual clarity in the front direction. Therefore, it is possible to achieve both visibility in the azimuth direction, which is normally difficult to see, and visibility in the front direction, which is visible in a static state. can be expected.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un film de diffusion de lumière anisotrope qui, en ce qui concerne les changements de luminance et de couleur dus à l'angle de vision, a un effet supérieur d'amélioration de la dépendance à l'angle visuel par rapport à l'état de la technique. Dans un film de diffusion de lumière anisotrope selon la présente invention, la transmittance linéaire représentée par (la quantité de lumière transmise dans la direction linéaire de la lumière incidente)/(intensité lumineuse de la lumière incidente) varie en fonction de l'angle d'incidence de la lumière. Le film de diffusion de lumière anisotrope a un axe central de diffusion, une région de matrice et une pluralité de régions en colonne qui sont différentes en indice de réfraction à partir de la région de matrice. La pluralité de régions en colonne sont configurées pour être orientées et s'étendre d'une surface à l'autre surface du film de diffusion de lumière anisotrope. Le rapport d'aspect de chaque région en colonne, qui est représentée comme l'axe majeur moyen/l'axe mineur moyen de cette région en colonne, dans une section transversale perpendiculaire à l'axe de colonne de cette région en colonne est de 2 à 12. La transmittance linéaire maximale du film de diffusion de lumière anisotrope dans l'orientation d'inclinaison de l'axe central de diffusion est de 30 % ou moins. L'angle d'axe central de diffusion du film de diffusion de lumière anisotrope est de 35° à 45°, l'angle d'axe central de diffusion étant l'angle polaire formé par la direction normale par rapport à la surface de film de diffusion de lumière anisotrope et la direction d'axe central de diffusion. La transmittance linéaire à l'angle d'incidence de la lumière de 0° est de 5 % ou plus.
PCT/JP2022/009243 2021-03-31 2022-03-03 Film de diffusion de lumière anisotrope et dispositif d'affichage WO2022209566A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023510715A JPWO2022209566A1 (fr) 2021-03-31 2022-03-03
CN202280012709.6A CN116802526A (zh) 2021-03-31 2022-03-03 各向异性光扩散膜和显示装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-062384 2021-03-31
JP2021062384 2021-03-31

Publications (1)

Publication Number Publication Date
WO2022209566A1 true WO2022209566A1 (fr) 2022-10-06

Family

ID=83458568

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/009243 WO2022209566A1 (fr) 2021-03-31 2022-03-03 Film de diffusion de lumière anisotrope et dispositif d'affichage

Country Status (4)

Country Link
JP (1) JPWO2022209566A1 (fr)
CN (1) CN116802526A (fr)
TW (1) TW202246814A (fr)
WO (1) WO2022209566A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097483A1 (fr) * 2001-05-28 2002-12-05 Clariant International Ltd Couche mince de diffusion de lumiere presentant des caracteristiques de diffusion regulee, element optique et afficheur a cristaux liquides comprenant ladite couche mince
JP2013019988A (ja) * 2011-07-08 2013-01-31 Mitsubishi Rayon Co Ltd 光制御フィルム
JP2013037337A (ja) * 2011-05-19 2013-02-21 Mitsubishi Rayon Co Ltd 光制御フィルム、光散乱膜、およびその製造方法
JP2013205688A (ja) * 2012-03-29 2013-10-07 Nitto Denko Corp 液晶表示装置
JP2014203004A (ja) * 2013-04-08 2014-10-27 株式会社ジャパンディスプレイ 表示装置及び電子機器
WO2015111523A1 (fr) * 2014-01-21 2015-07-30 株式会社巴川製紙所 Film optique anisotrope
WO2018051639A1 (fr) * 2016-09-14 2018-03-22 株式会社巴川製紙所 Corps stratifié de film de diffusion de lumière pour dispositif d'affichage réfléchissant, et dispositif d'affichage réfléchissant l'utilisant
WO2018180541A1 (fr) * 2017-03-31 2018-10-04 株式会社巴川製紙所 Film antireflet et dispositif d'affichage
JP2019179204A (ja) * 2018-03-30 2019-10-17 株式会社巴川製紙所 異方性光学フィルム
WO2020066312A1 (fr) * 2018-09-28 2020-04-02 株式会社巴川製紙所 Stratifié de conduit de lumière utilisant un film optique anisotrope, et dispositif d'éclairage plan pour dispositif d'affichage utilisant celui-ci
JP2020134830A (ja) * 2019-02-22 2020-08-31 Ｅｎｅｏｓ株式会社 映像投影システム

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097483A1 (fr) * 2001-05-28 2002-12-05 Clariant International Ltd Couche mince de diffusion de lumiere presentant des caracteristiques de diffusion regulee, element optique et afficheur a cristaux liquides comprenant ladite couche mince
JP2013037337A (ja) * 2011-05-19 2013-02-21 Mitsubishi Rayon Co Ltd 光制御フィルム、光散乱膜、およびその製造方法
JP2013019988A (ja) * 2011-07-08 2013-01-31 Mitsubishi Rayon Co Ltd 光制御フィルム
JP2013205688A (ja) * 2012-03-29 2013-10-07 Nitto Denko Corp 液晶表示装置
JP2014203004A (ja) * 2013-04-08 2014-10-27 株式会社ジャパンディスプレイ 表示装置及び電子機器
WO2015111523A1 (fr) * 2014-01-21 2015-07-30 株式会社巴川製紙所 Film optique anisotrope
WO2018051639A1 (fr) * 2016-09-14 2018-03-22 株式会社巴川製紙所 Corps stratifié de film de diffusion de lumière pour dispositif d'affichage réfléchissant, et dispositif d'affichage réfléchissant l'utilisant
WO2018180541A1 (fr) * 2017-03-31 2018-10-04 株式会社巴川製紙所 Film antireflet et dispositif d'affichage
JP2019179204A (ja) * 2018-03-30 2019-10-17 株式会社巴川製紙所 異方性光学フィルム
WO2020066312A1 (fr) * 2018-09-28 2020-04-02 株式会社巴川製紙所 Stratifié de conduit de lumière utilisant un film optique anisotrope, et dispositif d'éclairage plan pour dispositif d'affichage utilisant celui-ci
JP2020134830A (ja) * 2019-02-22 2020-08-31 Ｅｎｅｏｓ株式会社 映像投影システム

Also Published As

Publication number Publication date
CN116802526A (zh) 2023-09-22
JPWO2022209566A1 (fr) 2022-10-06
TW202246814A (zh) 2022-12-01

Similar Documents

Publication Publication Date Title
TWI578026B (zh) 各向異性光擴散膜
JP5960979B2 (ja) 光拡散フィルムおよび光拡散フィルムの製造方法
JP6230670B2 (ja) 異方性光拡散フィルム用組成物および異方性光拡散フィルム
JP5926941B2 (ja) 異方性光拡散フィルム用組成物および異方性光拡散フィルム
JP5999992B2 (ja) 光拡散フィルムの製造方法
JP6535158B2 (ja) 多角形状光拡散フィルムおよび多角形状光拡散フィルムの製造方法
JP2013210409A (ja) 異方性光拡散フィルム
JP2013148712A (ja) 光拡散フィルム用組成物および光拡散フィルム
JP7092962B1 (ja) 異方性光学フィルム用組成物及び異方性光学フィルム
JP7191537B2 (ja) 異方性光学フィルム
WO2022209566A1 (fr) Film de diffusion de lumière anisotrope et dispositif d'affichage
JP6227994B2 (ja) 反射型液晶表示装置
WO2022138390A1 (fr) Composition pour films optiques anisotropes et film optique anisotrope
WO2021187555A1 (fr) Composition de film optique anisotrope et film optique anisotrope
JP7475333B2 (ja) 異方性光学フィルムを用いた反射型表示装置
KR102473933B1 (ko) 적층체 및 적층체의 제조 방법
KR102473934B1 (ko) 적층체 및 적층체의 제조 방법
JP7475182B2 (ja) 異方性光拡散フィルム積層体および表示装置
WO2021200891A1 (fr) Film de diffusion de lumière anisotrope et dispositif d'affichage
JP2004361922A (ja) 塗布型光学膜用材料、およびそれを用いた光学多層膜と反射スクリーン
JP2022157897A (ja) 異方性光拡散フィルム積層体及び表示装置
JP2004361924A (ja) 塗布型光学膜用材料、およびそれを用いた光学多層膜と反射スクリーン

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22779791

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 202280012709.6

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2023510715

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22779791

Country of ref document: EP

Kind code of ref document: A1